feat(push-notifications): 新增挑战提醒定时推送功能

新增每日定时推送系统，根据用户参与状态发送不同类型的挑战提醒：
- 已参与用户：每日发送鼓励推送
- 未参与用户：隔天发送挑战邀请
- 匿名用户：隔天发送通用邀请

包含推送历史记录表、定时任务调度、多类型文案模板和防重复发送机制

src/push-notifications/challenge-reminder.service.ts

@@ -0,0 +1,384 @@
+import { Injectable, Logger } from '@nestjs/common';
+import { ConfigService } from '@nestjs/config';
+import { Cron } from '@nestjs/schedule';
+import { InjectModel } from '@nestjs/sequelize';
+import { Op } from 'sequelize';
+import { PushType } from 'apns2';
+import { PushNotificationsService } from './push-notifications.service';
+import { PushTokenService } from './push-token.service';
+import { UserPushToken } from './models/user-push-token.model';
+import { PushReminderHistory, ReminderType } from './models/push-reminder-history.model';
+import { ChallengesService } from '../challenges/challenges.service';
+import { Challenge } from '../challenges/models/challenge.model';
+import { ChallengeParticipant, ChallengeParticipantStatus } from '../challenges/models/challenge-participant.model';
+import { 
+  getEncouragementTemplate, 
+  getInvitationTemplate, 
+  getGeneralInvitationTemplate 
+} from './templates/challenge-templates';
+import * as dayjs from 'dayjs';
+
+@Injectable()
+export class ChallengeReminderService {
+  private readonly logger = new Logger(ChallengeReminderService.name);
+
+  constructor(
+    @InjectModel(UserPushToken)
+    private readonly pushTokenModel: typeof UserPushToken,
+    @InjectModel(PushReminderHistory)
+    private readonly reminderHistoryModel: typeof PushReminderHistory,
+    @InjectModel(ChallengeParticipant)
+    private readonly participantModel: typeof ChallengeParticipant,
+    private readonly pushNotificationsService: PushNotificationsService,
+    private readonly pushTokenService: PushTokenService,
+    private readonly challengesService: ChallengesService,
+    private readonly configService: ConfigService,
+  ) {}
+
+  /**
+   * 每晚8点执行的挑战提醒定时任务
+   */
+  @Cron('0 20 * * *', {
+    name: 'challengeReminder',
+    timeZone: 'Asia/Shanghai',
+  })
+  async handleChallengeReminder(): Promise<void> {
+    this.logger.log('Starting daily challenge reminder task...');
+
+    try {
+      // 检查是否为主进程（NODE_APP_INSTANCE 为 0）
+      const nodeAppInstance = this.configService.get<number>('NODE_APP_INSTANCE', 0);
+      if (Number(nodeAppInstance) !== 0) {
+        this.logger.log(`Not the primary process (instance: ${nodeAppInstance}). Skipping challenge reminder...`);
+        return;
+      }
+
+      this.logger.log('Primary process detected. Running challenge reminder...');
+
+      // 1. 获取所有活跃的推送令牌
+      const activeTokens = await this.getActivePushTokens();
+      if (activeTokens.length === 0) {
+        this.logger.log('No active push tokens found');
+        return;
+      }
+
+      this.logger.log(`Found ${activeTokens.length} active push tokens`);
+
+      // 2. 获取正在进行的挑战
+      const ongoingChallenges = await this.getOngoingChallenges();
+      if (ongoingChallenges.length === 0) {
+        this.logger.log('No ongoing challenges found');
+        return;
+      }
+
+      this.logger.log(`Found ${ongoingChallenges.length} ongoing challenges`);
+
+      // 3. 获取参与挑战的活跃用户
+      const activeParticipants = await this.getActiveParticipants(ongoingChallenges);
+      const participantUserIds = new Set(activeParticipants.map(p => p.userId));
+
+      this.logger.log(`Found ${activeParticipants.length} active participants`);
+
+      // 4. 按用户类型分组处理
+      await this.processTokensByUserType(activeTokens, participantUserIds, ongoingChallenges);
+
+    } catch (error) {
+      this.logger.error(`Error during challenge reminder task: ${error.message}`, error);
+    }
+  }
+
+  /**
+   * 获取所有活跃的推送令牌
+   */
+  private async getActivePushTokens(): Promise<UserPushToken[]> {
+    return await this.pushTokenModel.findAll({
+      where: {
+        isActive: true,
+      },
+    });
+  }
+
+  /**
+   * 获取正在进行中的挑战
+   */
+  private async getOngoingChallenges(): Promise<Challenge[]> {
+    const challenges = await this.challengesService['challengeModel'].findAll({
+      order: [['startAt', 'ASC']],
+    });
+
+    // 过滤出真正进行中的挑战
+    return challenges.filter(challenge => {
+      const start = dayjs(challenge.startAt);
+      const end = dayjs(challenge.endAt);
+      const current = dayjs();
+      
+      return current.isAfter(start, 'minute') && current.isBefore(end, 'minute');
+    });
+  }
+
+  /**
+   * 获取参与挑战的活跃用户
+   */
+  private async getActiveParticipants(challenges: Challenge[]): Promise<ChallengeParticipant[]> {
+    const challengeIds = challenges.map(challenge => challenge.id);
+    
+    return await this.participantModel.findAll({
+      where: {
+        challengeId: {
+          [Op.in]: challengeIds,
+        },
+        status: ChallengeParticipantStatus.ACTIVE,
+      },
+    });
+  }
+
+  /**
+   * 按用户类型分组处理推送令牌
+   */
+  private async processTokensByUserType(
+    tokens: UserPushToken[],
+    participantUserIds: Set<string>,
+    challenges: Challenge[]
+  ): Promise<void> {
+    // 分组：已参与挑战的用户、未参与挑战但有userId的用户、没有userId的用户
+    const participatingTokens: UserPushToken[] = [];
+    const nonParticipatingTokens: UserPushToken[] = [];
+    const anonymousTokens: UserPushToken[] = [];
+
+    for (const token of tokens) {
+      if (!token.userId) {
+        anonymousTokens.push(token);
+      } else if (participantUserIds.has(token.userId)) {
+        participatingTokens.push(token);
+      } else {
+        nonParticipatingTokens.push(token);
+      }
+    }
+
+    this.logger.log(`Token groups - Participating: ${participatingTokens.length}, Non-participating: ${nonParticipatingTokens.length}, Anonymous: ${anonymousTokens.length}`);
+
+    // 处理已参与挑战的用户 - 发送鼓励文案（每天）
+    await this.sendEncouragementReminders(participatingTokens);
+
+    // 处理未参与挑战但有userId的用户 - 发送邀请文案（隔天）
+    await this.sendInvitationReminders(nonParticipatingTokens, challenges, ReminderType.CHALLENGE_INVITATION);
+
+    // 处理没有userId的用户 - 发送通用邀请（隔天）
+    await this.sendInvitationReminders(anonymousTokens, challenges, ReminderType.GENERAL_INVITATION);
+  }
+
+  /**
+   * 发送鼓励提醒给已参与挑战的用户
+   */
+  private async sendEncouragementReminders(tokens: UserPushToken[]): Promise<void> {
+    if (tokens.length === 0) return;
+
+    this.logger.log(`Sending encouragement reminders to ${tokens.length} participating users`);
+
+    let totalSent = 0;
+    let totalFailed = 0;
+
+    for (const token of tokens) {
+      try {
+        // 检查今天是否已经发送过鼓励推送
+        const today = dayjs().startOf('day').toDate();
+        const recentReminder = await this.reminderHistoryModel.findOne({
+          where: {
+            userId: token.userId,
+            deviceToken: token.deviceToken,
+            reminderType: ReminderType.CHALLENGE_ENCOURAGEMENT,
+            lastSentAt: {
+              [Op.gte]: today,
+            },
+          },
+        });
+
+        if (recentReminder) {
+          this.logger.log(`User ${token.userId} already received encouragement reminder today`);
+          continue;
+        }
+
+        // 获取用户参与的挑战信息
+        const participant = await this.participantModel.findOne({
+          where: {
+            userId: token.userId,
+            status: ChallengeParticipantStatus.ACTIVE,
+          },
+          include: [{
+            model: Challenge,
+            as: 'challenge',
+          }],
+        });
+
+        if (!participant || !participant.challenge) {
+          this.logger.warn(`No active challenge found for user ${token.userId}`);
+          continue;
+        }
+
+        // 获取鼓励文案
+        const template = getEncouragementTemplate(participant.challenge.type);
+
+        // 发送推送
+        const result = await this.pushNotificationsService.sendBatchNotificationToDevices({
+          deviceTokens: [token.deviceToken],
+          title: template.title,
+          body: template.body,
+          pushType: PushType.alert,
+        });
+
+        if (result.code === 0) {
+          totalSent += result.data.successCount;
+          totalFailed += result.data.failedCount;
+
+          // 记录推送历史
+          await this.updateReminderHistory(
+            token.userId,
+            token.deviceToken,
+            ReminderType.CHALLENGE_ENCOURAGEMENT
+          );
+
+          this.logger.log(`Encouragement reminder sent to user ${token.userId}`);
+        } else {
+          totalFailed++;
+          this.logger.warn(`Failed to send encouragement reminder to user ${token.userId}: ${result.message}`);
+        }
+
+      } catch (error) {
+        this.logger.error(`Error sending encouragement reminder to user ${token.userId}: ${error.message}`, error);
+        totalFailed++;
+      }
+    }
+
+    this.logger.log(`Encouragement reminders completed. Sent: ${totalSent}, Failed: ${totalFailed}`);
+  }
+
+  /**
+   * 发送邀请提醒给未参与挑战的用户
+   */
+  private async sendInvitationReminders(
+    tokens: UserPushToken[],
+    challenges: Challenge[],
+    reminderType: ReminderType
+  ): Promise<void> {
+    if (tokens.length === 0 || challenges.length === 0) return;
+
+    this.logger.log(`Sending invitation reminders to ${tokens.length} users`);
+
+    let totalSent = 0;
+    let totalFailed = 0;
+
+    // 随机选择一个挑战类型用于邀请
+    const randomChallenge = challenges[Math.floor(Math.random() * challenges.length)];
+
+    for (const token of tokens) {
+      try {
+        // 检查是否可以发送（隔天推送）
+        const canSend = await this.canSendInvitation(token, reminderType);
+        if (!canSend) {
+          continue;
+        }
+
+        // 获取邀请文案
+        const template = reminderType === ReminderType.GENERAL_INVITATION
+          ? getGeneralInvitationTemplate()
+          : getInvitationTemplate(randomChallenge.type);
+
+        // 发送推送
+        const result = await this.pushNotificationsService.sendBatchNotificationToDevices({
+          deviceTokens: [token.deviceToken],
+          title: template.title,
+          body: template.body,
+          pushType: PushType.alert,
+        });
+
+        if (result.code === 0) {
+          totalSent += result.data.successCount;
+          totalFailed += result.data.failedCount;
+
+          // 记录推送历史，设置下次可发送时间为2天后
+          await this.updateReminderHistory(
+            token.userId,
+            token.deviceToken,
+            reminderType,
+            2 // 2天后可再次发送
+          );
+
+          this.logger.log(`Invitation reminder sent to ${token.userId || 'anonymous user'}`);
+        } else {
+          totalFailed++;
+          this.logger.warn(`Failed to send invitation reminder: ${result.message}`);
+        }
+
+      } catch (error) {
+        this.logger.error(`Error sending invitation reminder: ${error.message}`, error);
+        totalFailed++;
+      }
+    }
+
+    this.logger.log(`Invitation reminders completed. Sent: ${totalSent}, Failed: ${totalFailed}`);
+  }
+
+  /**
+   * 检查是否可以发送邀请（隔天推送逻辑）
+   */
+  private async canSendInvitation(token: UserPushToken, reminderType: ReminderType): Promise<boolean> {
+    const reminder = await this.reminderHistoryModel.findOne({
+      where: {
+        userId: token.userId,
+        deviceToken: token.deviceToken,
+        reminderType,
+        isActive: true,
+      },
+    });
+
+    if (!reminder) {
+      return true; // 没有记录，可以发送
+    }
+
+    // 检查是否到了下次可发送时间
+    if (reminder.nextAvailableAt && dayjs().isBefore(reminder.nextAvailableAt)) {
+      return false;
+    }
+
+    return true;
+  }
+
+  /**
+   * 更新推送历史记录
+   */
+  private async updateReminderHistory(
+    userId: string | null,
+    deviceToken: string,
+    reminderType: ReminderType,
+    daysUntilNext = 1
+  ): Promise<void> {
+    const now = new Date();
+    const nextAvailableAt = dayjs().add(daysUntilNext, 'day').toDate();
+
+    const [reminder, created] = await this.reminderHistoryModel.findOrCreate({
+      where: {
+        userId,
+        deviceToken,
+        reminderType,
+      },
+      defaults: {
+        userId,
+        deviceToken,
+        reminderType,
+        lastSentAt: now,
+        sentCount: 1,
+        nextAvailableAt,
+        isActive: true,
+      },
+    });
+
+    if (!created) {
+      await reminder.update({
+        lastSentAt: now,
+        sentCount: reminder.sentCount + 1,
+        nextAvailableAt,
+        isActive: true,
+      });
+    }
+  }
+}

src/push-notifications/models/push-reminder-history.model.ts

@@ -0,0 +1,83 @@
+import { Table, Column, Model, DataType, Index } from 'sequelize-typescript';
+
+export enum ReminderType {
+  CHALLENGE_ENCOURAGEMENT = 'challenge_encouragement', // 已参与挑战用户的鼓励推送
+  CHALLENGE_INVITATION = 'challenge_invitation',       // 未参与挑战用户的邀请推送
+  GENERAL_INVITATION = 'general_invitation',           // 无userId用户的通用邀请
+}
+
+@Table({
+  tableName: 't_push_reminder_history',
+  underscored: true,
+})
+export class PushReminderHistory extends Model {
+  @Column({
+    type: DataType.UUID,
+    defaultValue: DataType.UUIDV4,
+    primaryKey: true,
+  })
+  declare id: string;
+
+  @Column({
+    type: DataType.STRING,
+    allowNull: true,
+    comment: '用户ID，可能为空',
+  })
+  declare userId: string | null;
+
+  @Column({
+    type: DataType.STRING,
+    allowNull: false,
+    comment: '设备推送令牌',
+  })
+  declare deviceToken: string;
+
+  @Column({
+    type: DataType.ENUM(...Object.values(ReminderType)),
+    allowNull: false,
+    comment: '提醒类型',
+  })
+  declare reminderType: ReminderType;
+
+  @Column({
+    type: DataType.DATE,
+    allowNull: false,
+    comment: '最后发送时间',
+  })
+  declare lastSentAt: Date;
+
+  @Column({
+    type: DataType.INTEGER,
+    allowNull: false,
+    defaultValue: 0,
+    comment: '发送次数',
+  })
+  declare sentCount: number;
+
+  @Column({
+    type: DataType.DATE,
+    allowNull: true,
+    comment: '下次可发送时间',
+  })
+  declare nextAvailableAt: Date | null;
+
+  @Column({
+    type: DataType.BOOLEAN,
+    allowNull: false,
+    defaultValue: true,
+    comment: '是否激活',
+  })
+  declare isActive: boolean;
+
+  @Column({
+    type: DataType.DATE,
+    defaultValue: DataType.NOW,
+  })
+  declare createdAt: Date;
+
+  @Column({
+    type: DataType.DATE,
+    defaultValue: DataType.NOW,
+  })
+  declare updatedAt: Date;
+}

src/push-notifications/push-notifications.module.ts

@@ -8,9 +8,11 @@ import { PushTokenService } from './push-token.service';
 import { PushTemplateService } from './push-template.service';
 import { PushMessageService } from './push-message.service';
 import { PushTestService } from './push-test.service';
+import { ChallengeReminderService } from './challenge-reminder.service';
 import { UserPushToken } from './models/user-push-token.model';
 import { PushMessage } from './models/push-message.model';
 import { PushTemplate } from './models/push-template.model';
+import { PushReminderHistory } from './models/push-reminder-history.model';
 import { ConfigModule } from '@nestjs/config';
 import { DatabaseModule } from '../database/database.module';
 import { UsersModule } from '../users/users.module';
@@ -27,6 +29,7 @@ import { ChallengeParticipant } from '../challenges/models/challenge-participant
       UserPushToken,
       PushMessage,
       PushTemplate,
+      PushReminderHistory,
       ChallengeParticipant,
     ]),
   ],
@@ -41,6 +44,7 @@ import { ChallengeParticipant } from '../challenges/models/challenge-participant
     PushTemplateService,
     PushMessageService,
     PushTestService,
+    ChallengeReminderService,
   ],
   exports: [
     ApnsProvider,
@@ -49,6 +53,7 @@ import { ChallengeParticipant } from '../challenges/models/challenge-participant
     PushTemplateService,
     PushMessageService,
     PushTestService,
+    ChallengeReminderService,
   ],
 })
 export class PushNotificationsModule { }

src/push-notifications/templates/challenge-templates.ts

@@ -0,0 +1,127 @@
+import { ChallengeType } from '../../challenges/models/challenge.model';
+
+/**
+ * 挑战鼓励文案模板 - 针对已参与挑战的用户
+ */
+export const ENCOURAGEMENT_TEMPLATES = {
+  [ChallengeType.WATER]: [
+    { title: '饮水挑战进行中', body: '今天已有多人完成饮水目标！你也要记得多喝水哦！' },
+    { title: '健康饮水提醒', body: '加入饮水挑战的小伙伴们今天都很棒！你今天喝水达标了吗？' },
+    { title: '水分补充时间', body: '挑战者们都在坚持每日饮水目标，你也要跟上大家的步伐！' },
+    { title: '饮水习惯养成', body: '看到很多挑战伙伴都养成了良好饮水习惯，你也是其中一员！' },
+    { title: '团队饮水挑战', body: '今天挑战群里又有很多人完成了目标！别掉队，一起加油！' },
+  ],
+  [ChallengeType.EXERCISE]: [
+    { title: '运动挑战进行时', body: '今天已有多人完成运动目标！你也来动一动吧！' },
+    { title: '活力运动提醒', body: '挑战伙伴们都在坚持运动，每一滴汗水都是进步的见证！' },
+    { title: '运动习惯养成', body: '看到很多挑战者都养成了运动习惯，你也是其中一员！' },
+    { title: '团队运动挑战', body: '今天运动挑战群里又有很多人完成了目标！别掉队，一起加油！' },
+    { title: '运动生活分享', body: '挑战者们都在分享运动心得，你的今天运动了吗？' },
+  ],
+  [ChallengeType.DIET]: [
+    { title: '饮食挑战进行中', body: '今天已有多人记录了健康饮食！你也要记得合理搭配哦！' },
+    { title: '营养均衡提醒', body: '挑战伙伴们都在坚持健康饮食，为身体提供充足营养！' },
+    { title: '健康饮食分享', body: '看到很多挑战者都在分享健康餐，你今天吃了什么？' },
+    { title: '团队饮食挑战', body: '今天饮食挑战群里又有很多人完成了目标！一起健康饮食！' },
+    { title: '营养生活记录', body: '挑战者们都在记录饮食，关注健康，让每一餐都有意义！' },
+  ],
+  [ChallengeType.MOOD]: [
+    { title: '心情记录挑战', body: '今天已有多人记录了心情！你也来分享今天的感受吧！' },
+    { title: '情绪管理提醒', body: '挑战伙伴们都在关注情绪变化，让心情更加愉悦平和！' },
+    { title: '心情日记分享', body: '看到很多挑战者都在记录心情故事，你今天心情如何？' },
+    { title: '团队心情挑战', body: '今天心情挑战群里又有很多人分享了感受！一起关注心理健康！' },
+    { title: '情绪健康关怀', body: '挑战者们都在关爱自己的情绪，从记录心情开始！' },
+  ],
+  [ChallengeType.SLEEP]: [
+    { title: '睡眠挑战进行中', body: '今天已有多人保持了规律作息！你也要早睡早起哦！' },
+    { title: '优质睡眠提醒', body: '挑战伙伴们都在保持良好睡眠质量，享受每一个宁静的夜晚！' },
+    { title: '规律作息养成', body: '看到很多挑战者都养成了规律作息，你也是其中一员！' },
+    { title: '团队睡眠挑战', body: '今天睡眠挑战群里又有很多人完成了目标！一起健康作息！' },
+    { title: '休息时光分享', body: '挑战者们都在分享睡眠心得，你今天休息得好吗？' },
+  ],
+  [ChallengeType.WEIGHT]: [
+    { title: '体重管理挑战', body: '今天已有多人记录了体重变化！你也要坚持健康生活方式！' },
+    { title: '健康体重提醒', body: '挑战伙伴们都在坚持体重管理，享受轻松自在的生活！' },
+    { title: '体重记录分享', body: '看到很多挑战者都在记录体重变化，见证自己的进步！' },
+    { title: '团队体重挑战', body: '今天体重挑战群里又有很多人完成了目标！一起健康生活！' },
+    { title: '健康生活记录', body: '挑战者们都在坚持健康饮食+适量运动，你也是其中一员！' },
+  ],
+};
+
+/**
+ * 挑战邀请文案模板 - 针对未参与挑战但有userId的用户
+ */
+export const INVITATION_TEMPLATES = {
+  [ChallengeType.WATER]: [
+    { title: '饮水挑战邀请', body: '加入21天饮水挑战，养成健康饮水习惯！' },
+    { title: '健康饮水挑战', body: '每天适量饮水，让身体更健康。立即加入挑战！' },
+    { title: '饮水习惯养成', body: '挑战自己，养成良好饮水习惯，收获健康！' },
+  ],
+  [ChallengeType.EXERCISE]: [
+    { title: '运动挑战邀请', body: '加入运动挑战，让身体充满活力！' },
+    { title: '健身挑战', body: '21天运动挑战，塑造更好的自己！' },
+    { title: '运动习惯养成', body: '坚持运动，收获健康体魄，立即加入！' },
+  ],
+  [ChallengeType.DIET]: [
+    { title: '饮食挑战邀请', body: '加入健康饮食挑战，培养良好饮食习惯！' },
+    { title: '营养挑战', body: '21天饮食挑战，让营养均衡成为习惯！' },
+    { title: '健康饮食计划', body: '科学饮食，健康生活，从挑战开始！' },
+  ],
+  [ChallengeType.MOOD]: [
+    { title: '心情记录挑战', body: '加入心情记录挑战，关注情绪健康！' },
+    { title: '情绪管理挑战', body: '21天心情记录，让心灵更加宁静。' },
+    { title: '心理健康挑战', body: '记录心情，关爱自己，从现在开始！' },
+  ],
+  [ChallengeType.SLEEP]: [
+    { title: '睡眠挑战邀请', body: '加入优质睡眠挑战，养成规律作息！' },
+    { title: '作息规律挑战', body: '21天睡眠挑战，让身体得到充分休息。' },
+    { title: '健康睡眠计划', body: '改善睡眠质量，享受每一个清晨！' },
+  ],
+  [ChallengeType.WEIGHT]: [
+    { title: '体重管理挑战', body: '加入体重管理挑战，收获健康理想体重！' },
+    { title: '健康体重挑战', body: '21天体重管理，见证自己的变化！' },
+    { title: '体重目标挑战', body: '科学管理体重，享受健康生活！' },
+  ],
+};
+
+/**
+ * 通用邀请文案模板 - 针对没有userId的用户
+ */
+export const GENERAL_INVITATION_TEMPLATES = [
+  { title: '健康挑战邀请', body: '加入我们的健康挑战，开启健康生活新篇章！' },
+  { title: '21天挑战', body: '21天养成健康习惯，你准备好了吗？' },
+  { title: '健康生活', body: '追求健康生活，从参加挑战开始！' },
+  { title: '挑战自我', body: '挑战自己，收获健康，让生活更美好！' },
+  { title: '健康之旅', body: '开启健康之旅，遇见更好的自己！' },
+];
+
+/**
+ * 随机选择一个模板
+ */
+export function getRandomTemplate<T>(templates: T[]): T {
+  const randomIndex = Math.floor(Math.random() * templates.length);
+  return templates[randomIndex];
+}
+
+/**
+ * 根据挑战类型获取鼓励文案
+ */
+export function getEncouragementTemplate(challengeType: ChallengeType) {
+  const templates = ENCOURAGEMENT_TEMPLATES[challengeType] || ENCOURAGEMENT_TEMPLATES[ChallengeType.EXERCISE];
+  return getRandomTemplate(templates);
+}
+
+/**
+ * 根据挑战类型获取邀请文案
+ */
+export function getInvitationTemplate(challengeType: ChallengeType) {
+  const templates = INVITATION_TEMPLATES[challengeType] || INVITATION_TEMPLATES[ChallengeType.EXERCISE];
+  return getRandomTemplate(templates);
+}
+
+/**
+ * 获取通用邀请文案
+ */
+export function getGeneralInvitationTemplate() {
+  return getRandomTemplate(GENERAL_INVITATION_TEMPLATES);
+}